Perl::Critic is an extensible framework for
creating and applying coding standards to Perl
source code. Essentially, it is a static source
code analysis engine. It is distributed with a
number of Perl::Critic::Policy modules that
attempt to enforce various coding guidelines. Most
Policy modules are based on Damian Conway's book
Perl Best Practices. However, Perl::Critic is not
limited to PBP, and will even support Policies
that contradict Conway. You can enable, disable,
and customize those Polices through the
Perl::Critic interface. You can also create new
Policy modules that suit your own tastes.

cgi_buffer is a group of libraries that may be used to improve performance of CGI scripts (and other content generation engines) in some circumstances by applying performance-enhancing HTTP mechanisms that are typically not supported by them. Currently, Perl, Python, and PHP4 are supported. The Python library may also be used as a wrapper around another CGI script.

Triceps is an innovative embeddable Complex Event Processing (CEP) system. It can be thought of as an in-memory database driven by triggers, or a data-flow machine working on a stream of events, or a spreadsheet on steroids. The major architectural advantages of Triceps include the direct use of procedural logic (as opposed to all-SQL systems), support of both compiled and general scripting languages (C++, Perl), light weight, and easy extensibility.

IP::Country is a tool for fast lookup of country
codes from IP addresses. Finding out the country
of a client using only the IP address can be
difficult. Looking up the domain name associated
with that address can provide some help, but many
IP address are not reverse mapped to any useful
domain, and the most common domain (.com) offers
no help when looking for country. This module
comes bundled with a database of countries where
various IP addresses have been assigned. Although
the country of assignment will probably be the
country associated with a large ISP rather than
the client herself, this is probably good enough
for most log analysis applications, and under test
has proved to be as accurate as reverse-DNS and
WHOIS lookup.

HTML::PopupTreeSelect is a Perl module which creates
an HTML popup tree selector using HTML::Template.
The HTML and Javascript produced will work in Mozilla
1+ (Netscape 6+) on all operating systems and
Microsoft IE 5+ on Windows and Mac. The design for
this widget is based on the xTree widget from WebFX
and resembles a Windows Explorer directory tree.

HTML::TableExtract is a Perl module that
simplifies the extraction of information from
tables within HTML documents. Tables, no matter
how nested or clustered, can be targeted
symbolically with column headers or by more
specific depth and count information.

The Paranoid modules provide a number of routines that are intended for use in strict and taint-safe scripts. The modules cover a variety of tasks from command-line argument parsing to process and network management. All of the modules use a debug trace framework for diagnostic output that is easily used and extended for application code as well.

Finance-QuoteHist provides Finance::QuoteHist, a
Perl module that provides easy fetching of
historical stock quotes from a variety of sources
on the Web. The bundle includes the underlying
site-specific modules. Reliability is enhanced
through the use of symbolic extraction provided by
HTML::TableExtract along with automatic failover
to alternate sites.